bending vs incurvation

bending and incurvation both are nouns.

Word	Noun	Adjective	Verb	Adverb
bending	Yes	No	No	No
incurvation	Yes	No	No	No

As nouns, incurvation is a hyponym of bending; that is, incurvation is a word with a more specific, narrower meaning than bending:

Other hyponyms of bending include flexion, flexure, crouch, hunch.

bending (noun)	incurvation (noun)
the act of bending something	the action of creating a curved shape
the property of being bent or deflected	a shape that curves or bends inward
movement that causes the formation of a curve